@article{fdi:010071218, title = {{P}aleoenvironmental dynamics in {S}outh {A}mazonia, {B}razil, during the last 35,000 years inferred from pollen and geochemical records of {L}ago do {S}aci}, author = {{F}ontes, {D}. and {C}ordeiro, {R}. {C}. and {M}artins, {G}. {S}. and {B}ehling, {H}. and {T}urcq, {B}runo and {S}ifeddine, {A}bdelfettah and {S}eoane, {J}. {C}. {S}. and {M}oreira, {L}. {S}. and {R}odrigues, {R}. {A}.}, editor = {}, language = {{ENG}}, abstract = {{P}aleoenvironmental changes for the last 35,000 years were reconstructed from palynological, sedimentological and organic geochemical evidence from a well-dated sediment core from {L}ago do {S}aci ({S}outh {A}mazonia). {D}ry climatic conditions occurred between 35,000 and 18,200 cal yr {BP} as recorded by high frequencies of open savanna taxa and low lake level indicated by {S}agittaria and low {T}otal {O}rganic {C}arbon content. {C}old temperatures are indicated by the presence of {P}odocarpus and {I}lex. {A} sedimentation hiatus observed between 18,200 and 9200 cal yr {BP} was likely related to dry conditions. {T}he beginning of the {H}olocene was marked by rainforest expansion and an increase in carbon content that represented high lake levels and warmer and wetter climate conditions. {B}etween 7500 and 5000 cal yr {BP}, the expansion of open savanna, seasonal forest elements and abundant black carbon suggests a dry phase. {A}fter 5000 cal yr {BP}, rainforest expansion and higher lake levels indicate a return to wetter conditions. {A} reduction of flooding taxa ({C}eltis and {M}auritia) between 1800 and 1300 cal yr {BP}, high lake level conditions and maintenance of a forest physiognomy, suggests a decrease of regional precipitation and subsequent reduction of the flooded areas in a still humid climate regime.}, keywords = {{S}outh {A}mazonia ; {P}ollen ; {G}eochemical proxies ; {P}aleoenvironment ; {L}ast glacial maximum ; {H}olocene ; {BRESIL} ; {AMAZONIE}}, booktitle = {}, journal = {{Q}uaternary {S}cience {R}eviews}, volume = {173}, numero = {}, pages = {161--180}, ISSN = {0277-3791}, year = {2017}, DOI = {10.1016/j.quascirev.2017.08.021}, URL = {https://www.documentation.ird.fr/hor/fdi:010071218}, }